hurdfchdir.c

/* Change a port cell to a directory in an open file descriptor. Copyright (C) 1999, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */#include <errno.h>#include <unistd.h>#include <hurd.h>#include <hurd/port.h>#include <hurd/fd.h>#include <fcntl.h>int
_hurd_change_directory_port_from_fd (struct hurd_port *portcell, int fd)
{
int ret;
struct hurd_fd *d = _hurd_fd_get (fd);
if (!d)
return __hurd_fail (EBADF);
HURD_CRITICAL_BEGIN;
ret = HURD_PORT_USE (&d->port,
({
int ret;
/* We look up "." to force ENOTDIR if it's not a directory and EACCES if we don't have search permission. */
file_t dir = __file_name_lookup_under (port, ".",
O_NOTRANS, 0);
if (dir == MACH_PORT_NULL)
ret = -1;
else
{
_hurd_port_set (portcell, dir);
ret = 0;
}
ret;
}));
HURD_CRITICAL_END;
return ret;
}